Annnnnd Re-re-reamending and uninstalling. Even with correcting my user-error, the extension continues to show me the full thumbnail, along with the prominent word BLOCKED. Hope it works better for anyone else who uses it.
You can customize the overlay to not show the reason the video was blocked by going to the options page, go to "Overlays" on the left sidebar, then check "remove block reason". But the bold "BLOCKED" is not possible to remove for now. You can disable the entire overlay if you want by unchecking the "Show overlays" option. Thank you!
